Change in the microstructure and mechanical properties of drawn pearlitic steel with low-temperature aging

D. Hirakami, K. Ushioda, T. Manabe, K. Noguchi, K. Takai, Y. Hata, S. Hata, H. Nakashima

研究成果: ジャーナルへの寄稿会議記事査読

1 被引用数 (Scopus)

抄録

Hydrogen embrittlement is a serious problem in high-strength steels. Drawn pearlitic steel shows excellent resistance to hydrogen embrittlement despite its high strength, and aging treatment at a low temperature can simultaneously improve its strength and hydrogen-embrittlement resistance. To clarify the mechanism for this we have used thermal desorption analysis (TDA) and the newly developed precession electron diffraction analysis method in the transmission electron microscope. After aging at 100 °C for 10 min, the amount of hydrogen seen amount on the TDA curve reduced at around 100 °C. In contrast, when aging was performed at 300 °C, the hydrogen amount further reduced at around 100 °C and the unevenly deformed lamellar ferrite zone was locally recovered. For the samples that were aged at the low temperature, we confirmed that their yield strength and relaxation stress ratios increased simultaneously with improvement in the hydrogen-embrittlement property. We infer that segregation of carbon or formation of very fine carbide in dislocations during aging is the cause of these behaviors.

本文言語英語
論文番号012026
ジャーナルIOP Conference Series: Materials Science and Engineering
219
1
DOI
出版ステータス出版済み - 8月 1 2017
イベント38th Riso International Symposium on Materials Science - Riso, デンマーク
継続期間: 9月 4 20179月 8 2017

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 工学(全般)

フィンガープリント

「Change in the microstructure and mechanical properties of drawn pearlitic steel with low-temperature aging」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル